Debugging rw lock
Alfred Perlstein
bright at mu.org
Thu Feb 13 20:53:35 UTC 2014
Keep a stack of rwlocks owned in the struct thread.
-Alfred
On 2/13/14, 12:51 PM, Vijay Singh wrote:
> I am running into an issue where an rw lock is read locked and never
> unlocked, and causes a system to livelock. I was wondering if its possible
> to figure out which thread owns the read lock?
>
> It's the tcp pcbinfo lock.
>
> (kgdb-amd64-7.4-08) show_rwlock rw
> name : tcp
> class: rw
> flags: {SLEEP, INITED, WITNESS, RECURSE, UPGRADABLE}
> state: RLOCK: 1 locks
> waiters: writers
>
> Any help is appreciated.
>
> -vijay
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